Combined temperature and humidity detection instrument



FIG. 1 is a top, front and left side perspective view of a combined temperature and humidity detection instrument showing my new design;

FIG. 2 is a top, rear and right side perspective view; and,

FIG. 3 is a top plan view thereof.

The bottom plan view being flat, plane and unadorned. 

The ornamental design for a combined temperature and humidity detection instrument, as shown and described. 